Summary

The new genusHalysitastraeaGeyer 1968 (Amphiastreidae) from the Jipi formation (Lower Kimeridgian) of the La Guajira peninsula (Colombia) is in his skeletal form distinctly homoeomorphous with the early Paleozoic family Halysitidae (Tabulata). Both are characterized by the development of so-called «corallite chains».